(n.) The act or process of fixing limits or boundaries; limitation.

border line bound boundary boundary condition boundary line bounding bourn break boundary breakoff point ceiling circling-in circumscribing circumscription compass confine cutoff cutoff point deadline definition demarcation determinant determination division line encincture end extremity finish floor frontier hedge high-water mark inclusion-exclusion interface limen limit limitation limiting factor line line of demarcation low-water mark lower limit march mark mete specification start starting line starting point target date term terminal date terminus threshold time allotment upper limit